Tackle block



0'. H. M. DORNTE. TACKLE BLOCIS, APPLICATION FILED JULY 20.1920.

1 33k 34 Pwwmm (M. m 1922..

1 992 lbi f- C. H. M. DORNTE.

TACKLE BLOCK. APPLICATION FILED JULY 20. 1920.

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Application near July at, 1920. Serial no. serene.

(GRANTED UNDER THE PROVISIQNS Ol? THE ACT fill? llililtfiltl 3,1921, 4:1It, 1313.)

To all whom it may concern:

Be it known that l, Carin Hninnrorr Mars Donn'rn, citizen. of the GermanRepublic,

residing at No. 11 Branerlrnechtsgraben, Hamburg, Germany, have inventednew and userul Improvements 1n lackle Blocks (tor whlch I have filedapplications in Germany February 2, 1914, patented March 10, 1.921,

Number 334139, and Great Britain February 13, l914,patented July 23,1914:, Number 3823'), of which the following is a speci+ fication.

This invention relates to tackle blocks and in particular to tackleblocks havingmulti ple sheaves and being principally designed for use inlowering life boats. It is the ob ject 01 my invention to provide atackle block of an improved structure, in which the rope lines passthrough individual guides provided above each sheave, said guides thuseffectively preventtilting of the block. A further object of myinvention is to provide an improved vform of: guide. A. still furtherobject of my invention isto provide for said guides a carrying member ofan improved structure. A still further object of my invention is toprovide for simply and effec tively securing said guide bars within thecasing of the block; A still further object of my invention is tomountsaid guide carrying member intermediate the side plates of each sheave,and to secure the same by the same means by which the plates arefastened to each other, my novel rope line guiding means beingespecially adapted to be attached to and employed in conjunction withordinary old tackle blockswhether the same be made of wood or iron.

With these and other objects in view I have illustrated some practicalembodiments of my invention, by way of example, in the accompanyingdrawings, it beingunderstood that the same, or parts thereof, aresusceptible to modifications such as will readily suggest themselves tothose skilled in the art to which this invention appertains, withoutthereby involving a departure from the scope of my invention. lln thedrawings Fig. 1 is a front elevation of a tackle block, furnished withmy invention, Fig. 2 showing a side view, and Fig. 3 a plan view of thesame. ln Fig. 4: l have illustrated, in

front elevation, a wooden. block equipped with my invention, while Fig.5 is a side view, and 6 a top view off-I the same. .Reterring to thedrawings the sheaves a, which may be provided with suitable bearings,such roller bearings, are revolubly mounted ona transverse pin 0 whichpasses through the covering plates (3 and both parallel extending legsoi? each of the stirrups (Z and c, the covering plates 0 beingsecured tothe legs of the outer stirrup d; The covering plates 0 on either sideare interconnected by means of screw threaded bolts f which also passthrough intermediate plates 9 provided on either side of the legs oftheiinner'stirrup e. The bolts f pass through, and support, distancingpieces or sockets h extending between each two adjacent plates 0, c, andg, g. The bolts 7 in the top part of the block support the bars h.-which in the illustrated embodiment of my inventionoccupy the place ofthe outer pair of sockets A only the median sockets it being employed.still for distancing the plates gvrelatively to each other. These mediansockets 7t on the upper transverse bolts, too, may be dispensed with infavour oi? a third bar. it placed there instead, so that then, a bar itprovided over each sheave em ployed in the block. Each bar it isprovided with a passage i for a rope line, the

rope being thereby-effectively guided and thus prevents thedischargeblock from tilting and getting into disorder, The said passagei may consist of a hole bored through the bar 7%. ll. prefer to line thepassages 2' by means of special guide pieces or sockets 7:: which may bemade of wood, lignum vitae, fibre, or the like. The sockets 7c arepreferably provided with, a circumferential contraction into which therespective bar it enters for the purpose of fixedly holding the sockets.I prefer to compose each bar it of halvesclamped together he tween thewalls of theblock by means of the above mentioned bolts 7 the plane ofsection extending lengthwise of the bar. Both ends of each bar it" aresuitably curved to embrace the respective socket 7a by entering into thecontracted portion of the socket which is thus secured in place throughthe clamping action of the bolts 7. No further fastening means arerequired for the sockets 7c.

The central passage of each socket is is of such a form and finish as toprevent any damage to the rope line passing therethrough.

The Wooden tackle block shown in Figures 4 to 6, is of a similarconstruction and assembled in the same manner as the tackle blockhereinbefore described; except that'the inner stirrup is duplicated forapparent reasons. The sockets h as well as the rope guiding bars 7L aresimilar to those described in connection with the iron tackle blockillustrated in Figures 1 to 3. I prefer to give the sockets 72/ acylindrical form and to. provide ample space between two par-ah lcldisposed sockets in order to prevent water and moisture fromaccumulating in contact therewith, and to provide :01- an unobstructedaccess of air. Making the median sockets h of fibre secures theadvantage that the sockets will notbe liable to shrink or otherwisealter its form in consequence of alteration in the atmosphere.

If it is desired to equip an old tackle block with my novel rope guidingbars, this may be accomplished by removing the distancing sockets at thetop of the block and substituting the rope guiding bars h therefor,which may be secured in place by means of the old screw threaded boltsor rivets.

Safety blocks hitherto known having a guide plate above the middlesheave, require the provision. of special fastening means for the guideplate which is not adapted to allow of being readily attached to oldtackle blocks.

In the illustrated block constructions, the eye forethe swivel whichengages the hook that is to be connected to the lite boat, is

formed by the curved portions of the stirrup d and 'e'.

-What I claim as my invention and desire to secure by Letters Patent ofthe United States of. America, is

1. A tackle block, comprising in combination, at least one revolublesheave, side plates for said sheave, a member above said shea\ e andcomposed of lengthwise extending halves, said member being mountedbetween said side plates, apertured structures one at each end of said.bar and adapted to receive and guide a rope line o'li said sheave, saidstructures being secured in place between said halves of said member.

.2. A tackle block, comprising, in combination, at least one revolublesheave, side plates on either side of said sheave, transverselyextending fastening means for said side plates, a member disposed abovesaid sheave and. consisting of lengthwise extending halves, said memberbeing mounted be.- tween said side. plates and secured in place. bymeans of said fastening means. :ipcrtured structures one at each end ol'said member and adapted to receive and guide a ropeline of said sheave,said structures bein; held in place between said halves of said member.

tackle block, comprising, in combination, a plurality oi revoluble sh#aves, side plates on either side of said sheaves, transverselyextending fastening means for said side plates, individual meml'iersabove at least two of said sheaves, each member con sisting ollengthwise extending halves. said halves being mounted between the saidside. plates of the associated sheave and b means of said fasteningmeans, aperturcd struc tures one iror each end of each of said membersand adapted to receive and guide a rope line of the associated sheave,and a contraction on each of said structures and adapted to receive therespective ends of the. associated member, whereby said structures areheld in place through said fastening means acting upon said halves ofsaid members.

In testimony whereof I have signed my name to this specification in thepresence of: two subscribing witnesses.

CARL HEINRICH MAX DbRNTE.

Wi tnesses 7 mnnnron J ULIUS .POIHO \VILIIE M BREUXINGER.

